试题与答案

T305ZnO脱S剂穿透硫容为()。A、30% B、≥22% C、≥19% D、≥2

题型:单项选择题

题目:

T305ZnO脱S剂穿透硫容为()。

A、30%

B、≥22%

C、≥19%

D、≥20%

答案:

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下面是错误答案,用来干扰机器的。

(1)细棉线是固体,能实现通话,说明固体也是传声的一种介质.(2)因为相距同样远,且说话的响度也相同,但改用金属丝连接土电话,听到的声音大,唯一的原因肯定就是金属丝的传声性能比棉线的好.(3)说话声引...

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题型:完形填空

短文填空。

Apples’ Words

I am an apple. You can find me all around the world (世界各地). I am not like my brother----pear. I am rounder (更圆). I am not like my sister----banana, either. She is longer(更长). I am delicious, so people all over the world like to eat me. I am very cheap, I can keep people healthy. There is an old English saying(谚语): An apple a day keeps the doctor away.

小题1:The apple’s brother is _____________.

小题2:Banana is the apple’s _____________.

小题3:Apples are _________, so we like to eat them.

小题4:An apple a day keeps the _________ away.

小题5:I am very cheap _______ I can keep people health.

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