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【单选题】
植物合成乙烯的直接前体是( )A.
蛋氨酸（Met）
B.
1-氨基环丙烷-1-羧酸 (ACC)
C.
S-腺苷蛋氨酸（SAM）
D.
氨氧基乙酸（AOA ）
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反馈参考答案：
举一反三
【简答题】申明、声明 1. 为了避免误解,我需要再一次( )我的意见。 2. 同志在这个( )里提出的八项条件中,是国共两党和谈的基础。
【单选题】W：Whatisallthisglassdoingonthefloor?M：________A.Look at the window and you’ 11 see.
A.
W： What is all this glass doing on the floor? M：________ A.Look at the window and you’ 11 see.
B.
I’11 clean it.
C.
I’11 call the repair man.
D.
Can ’ t you find out?
【单选题】屋顶构造层次通常由( )组成。
A.
屋面层、楼板、地坪、附加层
B.
屋面层、承重结构、顶棚 、附加层
C.
支撑、楼板、顶棚 、附加层
D.
屋面层、梁、楼板 、附加层
【单选题】Putting a candle in the window _____ a traditional practice in many cultures, _____ has a variety of meanings in the United States. [ ]
A.
was; that
B.
is; it
C.
has been; which
D.
had been; which
【单选题】－It’s Sunday. ____________ ―Let’s see the lions. OK?
A.
Why do you want to see the lions?
B.
What do you want to do?
C.
When do you want to go?
D.
Why do you like the lion?
【单选题】W : What is all this glass doing on the floor? M:__________
A.
Look at the window and you' 11 see.
B.
I' ll clean it.
C.
I' 11 call the repair man.
D.
Can' t you find out?
【简答题】下列选项中哪一个属于公路等级划分的标准（ ） 。 A. 使用年限 B. 车道数 C. 交通量 D. 所处地理位置
【单选题】--- Would you mind my opening the window? --- _________________________________
A.
I would.
B.
I’m afraid it’s too windy.
C.
Yes, please go ahead.
D.
Sure. I’m going to close it soon.
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