调节器调节电压过低会导致发电机（）。 A.充电电流过大 B.充电电流过小 C.充电电

阅读理解。

     Water is the "life blood" of our earth. It is in every living thing. It is in the air. It runs through mountains

and valleys. It forms lakes and oceans. Water is everywhere.

     Nature has a great water system (水系). Rainwater finds its way to streams (溪流) and rivers. Rivers

lead to the oceans. At the mouths of the rivers, fresh water (淡水) joins the salt water of the oceans.

     Here at the mouth of a river there is much important plant and animal life. Pollution destroys (毁坏)

this life, so we have to clean our streams and rivers. Man has to work with nature-not against it.

1. According to the reading, water is like _____.

A. blood

B. rain

C. life

2. The mouth of a river is near _____.

A. the oceans

B. a stream

C. the mountains

3. There is much plant and animal life at the _____.

A. head of a river

B. mouth of a river

C. body of a stream

4. The water in streams and rivers all comes from _____.

A. rain  

B. nature

C. oceans

5. Which of the following statements is not true?

A. We can find water in our body.

B. Blood can be found in every living thing.

C. At the mouth of a river we can find many living things.

设变量a是int型，f是double型，i是float型，则表达式10 + ''a'' + i * f 值的数据类型是（ ）。

A．具有相关性，但非从属性的平行的

B．具有相关性，并且具有从属性的

C．不具有相关性，但具有从属性的

D．不具有相关性，也不具有从属性的

汽车的最高车速

我国《消费者权益保护法》规定，消费者在购买、使用商品和接受服务时享有的权利属于（　）。

A．索赔权利

B．人身和财产不受损害的权利

C．要求经营者提供高质量商品和服务的权利

D．要求经营者提供低价格商品和服务的权利

以下哪种汇款支持当日取消。（）

A.网汇通充值

B.按址汇款

C.网汇通卡

D.密码汇款