Shares on the stock market have ______ as

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问题单项选择题

Shares on the stock market have ______ as a result of a worldwide economic downturn.

A．turned

B．changed

C．floated

D．fluctuated

答案

参考答案：C

解析：：float指“(汇率)浮动”，如：the floating pound汇率浮动的英镑。

填空题

用单词的适当形式填空。

1. That's Deng Yaping. She _______ (bear) in 1973.

2. She started ice _______ (skate) when she was three.

3. Stop _______ (make) so much noise! I am doing my homework.

4. I learned _______ (ride) a bicycle when I was ten years old.

5. Ronaldo played for his _______ (nation) team when he was seventeen.

单项选择题

风湿性二尖瓣狭窄的特有体征是：（）

A．心尖部第一心音亢进

B．心尖部舒张期隆隆样杂音

C．心尖部收缩期吹风样杂音

D．胸骨左缘第二肋间隙第二心音亢进伴分裂

E．开瓣音