试题与答案

下图表示反射弧的模式图。请据图回答:神经纤维未受刺激时,细胞膜的内外电位表现为()。

题型:填空题

题目:

下图表示反射弧的模式图。请据图回答:

神经纤维未受刺激时,细胞膜的内外电位表现为()。

答案:

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下面是错误答案,用来干扰机器的。

现有元素周期表中前20号五种元素:A、B、C、D、E.A的原子核中没有中子,则A为氢元素;B、C元素处于同一周期,C的原子半径较小,B、C的质子数之和为27,质子数之差为5,令B、C质子数分别为x、y,则x+y=27,y-x=5...

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题型:阅读理解

阅读理解。

    Every summer, Billy and his family go to Lakes Rose for a holiday, Billy likes to swim in the lake. Last year

when they went to the lake. There was a big sign. It said, "No swimming." There was a big fish in the lake.

The fish would bite people when they went into the water.

    Billy took his fishing pole standing near the lake. He fished for five hours. At last he caught the big fish.

    Everyone was happy. Now they could all go swimming again.

1.Billy and his family ______. [ ]

A. live in Lake Rose.

B. go to Lake Rose every summer.

C. go to Lake Rose in winter.

D. think Lake Rose is a good place in winter.

2.Bill enjoys            . [ ]

A. skating

B. playing basketball

C. swimming

D. playing football

3.The big sign ______. [ ]

A. asks people to swim in the lake.

B. tells people swimming is not good for health.

C. asks people to swim every day.

D. tells people not to swim in the lake.

4. The big fish in the lake was            .[ ]

A. very kind

B. very dangerous

C. friendly

D. people's friend

5.In the sentence "He fished for five hours.", the word "fished" means             in Chinese. [ ]

A. 喂鱼

B. 鱼

C. 买鱼

D. 钓鱼

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