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【简答题】
选词填空。 good,   because,   taking,   through,   hobbies,   each,   collect Do you have any hobbies? If we don't have any 1._______ except school work, we may become boring people. And that can influence our studies. Studying without relaxing isn't 2._______ for health. We can' t get good grades if we have bad health. We should make use of our free time. We should do something we like. Some people like singing, 3._______ photos and drawing pictures. Other people prefer collecting stamps, reading or shopping. I have a few hobbies, but my favorite one is collecting stamps. I like it best 4._______ I can learn a lot of things from stamps. Some people 5._______ stamps because they can get money from the stamps. But I am just interested in collecting them and enjoy looking at them when I am free. Stamp collecting is becoming more and more popular all over the world. I know an Australian boy and a French girl 6._______ the Internet. They also like collecting stamps. We show our stamps to 7._______ other online. That is so cool.
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参考答案:
举一反三
【单选题】原核细胞与真核细胞都具有的细胞器是
A.
核糖体
B.
线粒体
C.
中心体
D.
溶酶体
【单选题】原核细胞与真核细胞都具有的细胞器是()
A.
核糖体
B.
线粒体
C.
中心体
D.
细胞核
【单选题】原核细胞与真核细胞都具有的细胞器是
A.
细胞核
B.
核糖体
C.
溶酶体
D.
线粒体
【单选题】某系统总体结构如下图所示 该系统结构图的宽度是
A.
2
B.
3
C.
4
D.
5
【单选题】原核细胞与真核细胞都具有的细胞器是
A.
内质网
B.
高尔基体
C.
核糖体
D.
溶酶体
【单选题】某系统总体结构如下图所示 该系统结构图的最大扇出数是
A.
2
B.
5
C.
3
D.
1
【单选题】某系统总体结构如下图所示 该系统结构图的最大扇出数是
A.
3
B.
1
C.
5
D.
2
【简答题】DNA琼脂糖凝胶电泳时,在DNA样品中加入40%的蔗糖和溴酚蓝的作用分别是____,____。
【单选题】P14.某系统总体结构如下图所示 该系统结构图的最大扇出数是
A.
3
B.
5
C.
2
D.
1
【单选题】原核细胞与真核细胞都具有的细胞器是
A.
核糖体
B.
线粒体
C.
中心体 D.溶酶体
D.
溶酶体
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