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【单选题】
司机在操作中必须听从()的指挥,但对任何人发出的危险信号都应紧急停车。
A.
领导
B.
起重指挥
C.
起重工
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参考答案:
举一反三
【简答题】给定集合 A ={ a 1 , a 2 , a 3 ,…, a n }( n ∈N , n ≥3),定义 a i + a j (1≤ i $amp; j≤ n , i , j ∈N )中所有不同值的个数为集合 A 两元素和的容量,用 L ( A )表示,若 A ={2,4,6,8},则 L ( A )=____;若数列{ a n }是等差数列,设集合 A ={ a 1 , a 2 , a ...
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【单选题】水稻中非糯性(W)对糯性(w)为显性,非糯性品系的花粉遇碘呈蓝黑色,糯性品系的花粉遇碘呈红褐色。下面是对纯种的非糯性与糯性水稻的杂交后代进行观察的结果,其中能直接证明孟德尔的基因分离定律的一项是( )
A.
杂交后亲本植株上结出的种子(F 1 )遇碘全部呈蓝黑色
B.
F 1 自交后结出的种子(F 2 )遇碘后,3/4呈蓝黑色,1/4呈红褐色
C.
F 1 产生的花粉遇碘后,一半呈蓝黑色,一半呈红褐色
D.
F 1 测交所结出的种子遇碘后,一半呈蓝黑色,一半呈红褐色
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【单选题】There are a lot of apples ______ the tree and some birds are ______ the tree, too. [ ]
A.
in, in
B.
in, on
C.
on, on
D.
on, in
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【单选题】把‘今天天气不错!’变为‘今天天气不错’是( )。
A.
<sup></sup>
B.
<s></s>
C.
<tt></tt>
D.
<sub></sub>
E.
<i></i>
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【单选题】There’s lots of fruit ________ the tree. Our little cat is also _________ the tree.
A.
in;in
B.
on;on
C.
in;on
D.
on;in
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【单选题】There _____an old tree here. I wonder how they could manage to remove such an old tree.
A.
seemed not
B.
not seemed
C.
didn’t seem to be
D.
didn’t seem to have
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【单选题】---Are there any kites________ the tree? ---No, but there is an apple ______the tree.
A.
in, in
B.
in, on
C.
on, in
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【单选题】There are some apples ________ the tree. There are some birds ________ the tree, too.
A.
on; in
B.
in, in
C.
on; on
D.
in; on
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【单选题】如图所示茎叶图是甲乙两班各 5名学生的数学竞赛成绩(70分-99分),其中 a , b ∈ N ,若甲的平均成绩不大于乙的平均成绩,且 a 2 - b - 28=0,则 a 的所有取值构成的集合为 ( )
A.
{7,8,9}
B.
{6,7}
C.
{6,7,8,9}
D.
{1,2,3,4,5,6}
查看完整题目与答案
【单选题】-Why are you sitting so ________ to the tree? - Because I want to watch the birds in the tree _________. [ ]
A.
close; close
B.
close; closely
C.
closely; close
D.
closely; closely
查看完整题目与答案
相关题目:
【简答题】给定集合 A ={ a 1 , a 2 , a 3 ,…, a n }( n ∈N , n ≥3),定义 a i + a j (1≤ i $amp; j≤ n , i , j ∈N )中所有不同值的个数为集合 A 两元素和的容量,用 L ( A )表示,若 A ={2,4,6,8},则 L ( A )=____;若数列{ a n }是等差数列,设集合 A ={ a 1 , a 2 , a ...
查看完整题目与答案
【单选题】水稻中非糯性(W)对糯性(w)为显性,非糯性品系的花粉遇碘呈蓝黑色,糯性品系的花粉遇碘呈红褐色。下面是对纯种的非糯性与糯性水稻的杂交后代进行观察的结果,其中能直接证明孟德尔的基因分离定律的一项是( )
A.
杂交后亲本植株上结出的种子(F 1 )遇碘全部呈蓝黑色
B.
F 1 自交后结出的种子(F 2 )遇碘后,3/4呈蓝黑色,1/4呈红褐色
C.
F 1 产生的花粉遇碘后,一半呈蓝黑色,一半呈红褐色
D.
F 1 测交所结出的种子遇碘后,一半呈蓝黑色,一半呈红褐色
查看完整题目与答案
【单选题】There are a lot of apples ______ the tree and some birds are ______ the tree, too. [ ]
A.
in, in
B.
in, on
C.
on, on
D.
on, in
查看完整题目与答案
【单选题】把‘今天天气不错!’变为‘今天天气不错’是( )。
A.
<sup></sup>
B.
<s></s>
C.
<tt></tt>
D.
<sub></sub>
E.
<i></i>
查看完整题目与答案
【单选题】There’s lots of fruit ________ the tree. Our little cat is also _________ the tree.
A.
in;in
B.
on;on
C.
in;on
D.
on;in
查看完整题目与答案
【单选题】There _____an old tree here. I wonder how they could manage to remove such an old tree.
A.
seemed not
B.
not seemed
C.
didn’t seem to be
D.
didn’t seem to have
查看完整题目与答案
【单选题】---Are there any kites________ the tree? ---No, but there is an apple ______the tree.
A.
in, in
B.
in, on
C.
on, in
查看完整题目与答案
【单选题】There are some apples ________ the tree. There are some birds ________ the tree, too.
A.
on; in
B.
in, in
C.
on; on
D.
in; on
查看完整题目与答案
【单选题】如图所示茎叶图是甲乙两班各 5名学生的数学竞赛成绩(70分-99分),其中 a , b ∈ N ,若甲的平均成绩不大于乙的平均成绩,且 a 2 - b - 28=0,则 a 的所有取值构成的集合为 ( )
A.
{7,8,9}
B.
{6,7}
C.
{6,7,8,9}
D.
{1,2,3,4,5,6}
查看完整题目与答案
【单选题】-Why are you sitting so ________ to the tree? - Because I want to watch the birds in the tree _________. [ ]
A.
close; close
B.
close; closely
C.
closely; close
D.
closely; closely
查看完整题目与答案
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