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【多选题】
A: 1. ? B: Not yet. Exercise 3 is too difficult for me. A: Don’t worry. 2 _ ___. B: It’s very kind of you. But I think I can do it myself. Can you lend me your English- Chinese dictionary? A: With pleasure. 3 ______. B: Thanks. 4 _________, is Miss Gao at the teachers’ office? A: Oh, no. She’s out at the moment. B: 5_________? Do you know? I have some questions to ask her. A: I think she is at the library. She told me she wanted to borrow some books. B: I have to wait for her.A.
Oh, I see
B.
I’ll help you.
C.
Have you finished your homework?
D.
Where is she?
E.
By the way
F.
What’s your trouble?
G.
Here you are.
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【单选题】In the world of sport, the four-minute mile — the 'dream mile' — until recently was the most intriguing goal remaining to the individual athlete.
A.
daring
B.
demanding
C.
thought-provoking
D.
fascinating
【简答题】[化学--物质的结构与性质] 砷化镓属于第三代半导体，它能直接将电能转变为光能，砷化镓灯泡寿命是普通灯泡的100倍，而耗能只有其10%，推广砷化镓等发光二极管（LED）照明，是节能减排的有效举措，已知砷化镓的晶胞结构如图．试回答下列问题 （1）下列说法正确的是______（选填序号）． A．砷化镓晶胞结构与NaCl相同 B．第一电离能：As＞Ga C．电负性：As＞Ga D．砷和镓都属于p区元素 ...
【单选题】—What’s your favorite sport? —Swimming. I think it’s _______. [ ]
A.
easier
B.
more difficult
C.
the most interesting
D.
the most boring
【简答题】实际利率理论认为，投资是利率的（）函数。
【简答题】砷化镓属于第三代半导体，它能直接将电能转变为光能，砷化镓灯泡寿命是普通灯泡的100倍，而耗能只有其10%，推广砷化镓等发光二极管（LED）照明，是节能减排的有效举措，已知砷化镓的晶胞结构如右图。试回答下列问题 （1）下列说法正确的是 ▲ （选填序号）。 A．砷化镓晶胞结构与NaCl相同 B．第一电离能：As＞Ga C．电负性:As＞Ga D．砷和镓都属于p区元素 ...
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