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【多选题】
合成氨反应 N 2 +3H 2 ←→ 2NH 3 为一放热反应,为了增大 NH 3 的收得率,可采取的措施是( )
A.
加入催化剂
B.
降低温度
C.
增大压力
D.
增大 N 2 的物质的量
E.
增大 H 2 的物质的量
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【判断题】Silk has also brought the ancient Chinese civilization overseas and it serves as the "cultural messenger" of Chinese civilization.
A.
正确
B.
错误
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【单选题】某哺乳动物一个初级精母细胞经过减数分裂产生了染色体数目全部不正常的配子，最可能的原因是（）
A.
一对同源染色体没有发生分离
B.
四分体时非姐妹染色单体交叉互换
C.
一个次级精母细胞分裂不正常
D.
一条染色体的姐妹染色单体没有分开
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【单选题】They also have a camera ______allows you to take and share photos and video.
A.
which
B.
where
C.
when
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【简答题】Everyone wants to be successful. As a student, you also want to have success at school, no matter w __ 小题1: __ you’re good at studies or not. But it’s d i fficult to learn all the lessons well because...
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【单选题】听力原文：W: Bob, would you please come in for a while? Please also bring along the minutes of yesterday's management meeting. M: Of course, Madame. Here is the minutes of the meeting. The meeting was dela...
A.
He is a manager.
B.
He is a clerk.
C.
He is a secretary.
D.
He is a chairman.
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【多选题】近代上海社会心态发生根本转变,主要体现在( )。
A.
“交相利”的谋生心态
B.
重利轻义
C.
重义轻利
D.
重商思想
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【判断题】Chinese civilization is the oldest human civilization in history.
A.
正确
B.
错误
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【单选题】听力原文：W: Good morning, Chuck, are you also here waiting for Professor Johnson? M: Oh, yes. Good morning, Lori. The professor asked me to come for an interview. Do you know about the job working as a te...
A.
On his way home from school.
B.
Waiting for Lori.
C.
Doing his English assignments.
D.
Waiting to see Prof. Johnson.
查看完整题目与答案
【单选题】某哺乳动物的一个初级精母细胞经过减数分裂后产生了染色体数目全部不正常的配子 , 最可能的原因是 ( )
A.
. 该细胞减数第一次分裂时 , 有一对同源染色体不发生分离 ; 减数第二次分裂正常
B.
. 该细胞减数第一次分裂时 , 四分体中的非姐妹染色单体交叉互换 ; 减数第二次分裂正常
C.
该细胞减数第一次分裂正常 , 减数第二次分裂时 , 一个次级精母细胞分裂正常 , 另一个分裂不正常
D.
C . 该细胞减数第一次分裂正常 , 减数第二次分裂时 , 一个次级精母细胞分裂正常 , 另一个分裂不正常
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【单选题】下列的糖能发生银镜反应的是
A.
淀粉
B.
纤维素
C.
糖原
D.
蔗糖
E.
葡萄糖
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相关题目：
【判断题】Silk has also brought the ancient Chinese civilization overseas and it serves as the "cultural messenger" of Chinese civilization.
A.
正确
B.
错误
查看完整题目与答案
【单选题】某哺乳动物一个初级精母细胞经过减数分裂产生了染色体数目全部不正常的配子，最可能的原因是（）
A.
一对同源染色体没有发生分离
B.
四分体时非姐妹染色单体交叉互换
C.
一个次级精母细胞分裂不正常
D.
一条染色体的姐妹染色单体没有分开
查看完整题目与答案
【单选题】They also have a camera ______allows you to take and share photos and video.
A.
which
B.
where
C.
when
查看完整题目与答案
【简答题】Everyone wants to be successful. As a student, you also want to have success at school, no matter w __ 小题1: __ you’re good at studies or not. But it’s d i fficult to learn all the lessons well because...
查看完整题目与答案
【单选题】听力原文：W: Bob, would you please come in for a while? Please also bring along the minutes of yesterday's management meeting. M: Of course, Madame. Here is the minutes of the meeting. The meeting was dela...
A.
He is a manager.
B.
He is a clerk.
C.
He is a secretary.
D.
He is a chairman.
查看完整题目与答案
【多选题】近代上海社会心态发生根本转变,主要体现在( )。
A.
“交相利”的谋生心态
B.
重利轻义
C.
重义轻利
D.
重商思想
查看完整题目与答案
【判断题】Chinese civilization is the oldest human civilization in history.
A.
正确
B.
错误
查看完整题目与答案
【单选题】听力原文：W: Good morning, Chuck, are you also here waiting for Professor Johnson? M: Oh, yes. Good morning, Lori. The professor asked me to come for an interview. Do you know about the job working as a te...
A.
On his way home from school.
B.
Waiting for Lori.
C.
Doing his English assignments.
D.
Waiting to see Prof. Johnson.
查看完整题目与答案
【单选题】某哺乳动物的一个初级精母细胞经过减数分裂后产生了染色体数目全部不正常的配子 , 最可能的原因是 ( )
A.
. 该细胞减数第一次分裂时 , 有一对同源染色体不发生分离 ; 减数第二次分裂正常
B.
. 该细胞减数第一次分裂时 , 四分体中的非姐妹染色单体交叉互换 ; 减数第二次分裂正常
C.
该细胞减数第一次分裂正常 , 减数第二次分裂时 , 一个次级精母细胞分裂正常 , 另一个分裂不正常
D.
C . 该细胞减数第一次分裂正常 , 减数第二次分裂时 , 一个次级精母细胞分裂正常 , 另一个分裂不正常
查看完整题目与答案
【单选题】下列的糖能发生银镜反应的是
A.
淀粉
B.
纤维素
C.
糖原
D.
蔗糖
E.
葡萄糖
查看完整题目与答案