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【单选题】
为预防佝偻病,维生素D每日用量一般是A.
400U
B.
1000U
C.
1500U
D.
2000U
E.
3000U
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反馈参考答案：
举一反三
【单选题】—What happened? Your boss seems to _______. —Didn’t you know his secretary leaked the secret report to the press
A.
be over the moon
B.
laugh his head off
C.
be all ears
D.
fly off the handle
【多选题】下列关于千步当量描述正确的是
A.
一个千步当量等于 4km/h 中速步行 10 分钟的活动量
B.
一个千步当量等于 8km/h 跑步 8 分钟的活动量
C.
一个千步当量等于 16km/h 骑自行车 10 分钟的活动量
D.
一个千步当量等于洗盘子或熨衣服 15 分钟的活动量
E.
一个千步当量等于办公室伏案工作 20 分钟的活动量
【简答题】写出声波传递的运动方程。
【单选题】What is meant by 'peer-on-peer' in the second paragraph?
A.
Acting as equals.
B.
Peeking secretively.
C.
Looking furtively.
D.
Having more and more.
【简答题】根据给出的中文意思，写出短语：数字音乐播放器
【简答题】假如你是小宇，想要回被没收的 ＭＰ 3 （音乐播放器），你会怎么跟妈妈说呢？（ 3 分）
【单选题】What are they?()? It’s a secret. But I’ll give you some hints, anyway.
A.
Is it a secret
B.
Can I have an idea about them
C.
Why do you keep it a secret
【单选题】What would the students do if they want to see other advisors?
A.
They have to see the secretary first.
B.
They can come at any time.
C.
They have to wait outside for a while.
D.
They need to make appointments.
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