《煤矿安全质量标准化标准》规定，防治水应坚持“有疑必深”，凡不清楚或有怀疑的地段，都必须安排探放水井有防探水钻孔设计及( )。

(句子释义)The wretched boy never set foot upon a football f...

单项选择题(句子释义)The wretched boy never set foot upon a football field without scoring a goal.
A. Each time this boy played football, he was sure to get the ball into the goal.
B. This unfortunate boy never played football, as he couldn't score a goal.
C. This boy was unhappy because he didn't kick the ball into the goal.
D. If this boy didn't score a goal he would feel wretched.

生物质混燃发电至今无实质性的经济激励政策，主要原因是混入煤炭的生物质原料量较少。( )A.对B.错

单项选择题生物质混燃发电至今无实质性的经济激励政策，主要原因是混入煤炭的生物质原料量较少。( )

The more words you are familiar with, the less you are ...

单项选择题The more words you are familiar with, the less you are aware of reading words and ________ you are aware of content and meaning.
A. more
B. less
C. the more
D. the less