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【单选题】
下面有关生物实验的叙述中，下列选项正确的说法是 ①探究温度对淀粉酶活性的影响实验时，用试剂进行检测不影响实验结果 ②用显微镜观察正在发生质壁分离的紫色洋葱表皮细胞，可见其液泡的颜色逐渐变浅 ③用高倍镜观察真核细胞的线粒体，可见它有双层膜，内膜向内折叠形成山脊 ④在含有可溶性还原糖的溶液中加入试剂，摇匀就出现砖红色沉淀 ⑤将肝脏研磨液煮沸冷却后，加入到过氧化氢溶液中立即出现大量气泡 ⑥调查人群中某种遗传病的发病率时，应选择有该遗传病的家系进行调查 ⑦观察植物细胞的质壁分离与复原和观察植物细胞的有丝分裂实验都可以用洋葱鳞片叶表皮细胞做实验材料 ⑧做基因的分离定律和基因的自由组合定律的杂交实验时，选用小麦做实验材料比选用玉米做实验材料优越 [     ]
A.
以上说法全部错误
B.
以上说法全部正确
C.
以上说法有两项正确
D.
以上说法有五项错误
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参考答案：
举一反三
【单选题】微量元素指的是
A.
自然界含量很少的元素
B.
人体吸收率很低的元素
C.
人体利用率很低的元素
D.
人体需要量很低的元素
查看完整题目与答案
【简答题】Dear Ann, I’m really anxious , because I can’t my backpack. I think I _ it during the concert，so it still be in the symphony hall. I really need it I will have a math test tomorrow. It’s important bec...
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【简答题】下列程序的运行结果中的第3行是______。 #include int main() { int i, j, a[3][3]; for(i=0; i<3; i++) { for(j=0;j<3;j++) { if(i+j==3) a[i][j]=a[i-1][j]+1; else a[i][j]=j; printf(" %4d" , a[i][j]) ; } printf( "\n" ) ; }...
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【单选题】I think that I committed a ______ in asking her because she seemed very upset by my question.
A.
blunder
B.
revenge
C.
reproach
D.
scandal
查看完整题目与答案
【单选题】听力原文：W: Hello. 24th Precinct. Officer Jones speaking. M: Help. Yeah, uh, it was wild, I mean really bizarre. W: Calm down sir! Now, what do you want to report? M: Well, I'd like to report a UFO sighti...
A.
He was returning home from a party.
B.
He just got off work when he saw the UFO.
C.
He was driving home from a restaurant.
D.
He was driving home from a cinema.
查看完整题目与答案
【简答题】下列程序的运行结果中的第 3 行是 # include int main() { inti, j, a[3][3]; for(i=0; i<3; i++) { for(j=0; j<3; j ++) { if(i+j==3) a[i][j]=a[i-1]CiJ+1; else a[i][j]=j ; printf("%4d", a[i][i]); } printf("\n"); } return...
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【单选题】听力原文：Police Officer: Hello. 24th Precinct. Officer Jones speaking. Man: Help. Yeah，uh，it was wild，I mean really bizarre. Police Officer: Calm down sir!Now，what do you want to report? Man: Well，I'd lik...
A.
about 12:00 AM
B.
about 3:00 AM
C.
about 5:00 AM
D.
about 24:00
查看完整题目与答案
【判断题】根据收付实现制,凡是不属于当期的收入和费用,即使款项已在当期收付,也不应当作为当期的收入和费用。
A.
正确
B.
错误
查看完整题目与答案
【单选题】微量元素指的是( )
A.
自然界含量很少的元素
B.
人体吸收率很低的元素
C.
人体利用率很低的元素
D.
人体需要量很低的元素
E.
以上都包括
查看完整题目与答案
【单选题】听力原文：W: Hello. 15th District Officer Mary speaking. M: Help. Yeah, uh, it was wild, I mean really weird. W: Calm down, sir! Now, what do you want to report? M: Well, I'd like to report a UFO sighting....
A.
He was returning home from a party.
B.
He just got off work when he saw the UFO.
C.
He was driving home from a restaurant.
D.
He was coming home from a police station.
查看完整题目与答案
相关题目：
【单选题】微量元素指的是
A.
自然界含量很少的元素
B.
人体吸收率很低的元素
C.
人体利用率很低的元素
D.
人体需要量很低的元素
查看完整题目与答案
【简答题】Dear Ann, I’m really anxious , because I can’t my backpack. I think I _ it during the concert，so it still be in the symphony hall. I really need it I will have a math test tomorrow. It’s important bec...
查看完整题目与答案
【简答题】下列程序的运行结果中的第3行是______。 #include int main() { int i, j, a[3][3]; for(i=0; i<3; i++) { for(j=0;j<3;j++) { if(i+j==3) a[i][j]=a[i-1][j]+1; else a[i][j]=j; printf(" %4d" , a[i][j]) ; } printf( "\n" ) ; }...
查看完整题目与答案
【单选题】I think that I committed a ______ in asking her because she seemed very upset by my question.
A.
blunder
B.
revenge
C.
reproach
D.
scandal
查看完整题目与答案
【单选题】听力原文：W: Hello. 24th Precinct. Officer Jones speaking. M: Help. Yeah, uh, it was wild, I mean really bizarre. W: Calm down sir! Now, what do you want to report? M: Well, I'd like to report a UFO sighti...
A.
He was returning home from a party.
B.
He just got off work when he saw the UFO.
C.
He was driving home from a restaurant.
D.
He was driving home from a cinema.
查看完整题目与答案
【简答题】下列程序的运行结果中的第 3 行是 # include int main() { inti, j, a[3][3]; for(i=0; i<3; i++) { for(j=0; j<3; j ++) { if(i+j==3) a[i][j]=a[i-1]CiJ+1; else a[i][j]=j ; printf("%4d", a[i][i]); } printf("\n"); } return...
查看完整题目与答案
【单选题】听力原文：Police Officer: Hello. 24th Precinct. Officer Jones speaking. Man: Help. Yeah，uh，it was wild，I mean really bizarre. Police Officer: Calm down sir!Now，what do you want to report? Man: Well，I'd lik...
A.
about 12:00 AM
B.
about 3:00 AM
C.
about 5:00 AM
D.
about 24:00
查看完整题目与答案
【判断题】根据收付实现制,凡是不属于当期的收入和费用,即使款项已在当期收付,也不应当作为当期的收入和费用。
A.
正确
B.
错误
查看完整题目与答案
【单选题】微量元素指的是( )
A.
自然界含量很少的元素
B.
人体吸收率很低的元素
C.
人体利用率很低的元素
D.
人体需要量很低的元素
E.
以上都包括
查看完整题目与答案
【单选题】听力原文：W: Hello. 15th District Officer Mary speaking. M: Help. Yeah, uh, it was wild, I mean really weird. W: Calm down, sir! Now, what do you want to report? M: Well, I'd like to report a UFO sighting....
A.
He was returning home from a party.
B.
He just got off work when he saw the UFO.
C.
He was driving home from a restaurant.
D.
He was coming home from a police station.
查看完整题目与答案
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