— What are you doing? — I'm______________爱下问搜题

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问题选择题

— What are you doing?

— I'm ______________.[ ]

A. having lunch

B. have lunch

C. has lunch

答案

答案：A

选择题

This book is _____for a six-year-old child to read.[ ]

A. enough easy.

B. enough easily.

C. easy enough.

D. easily enough.

单项选择题

相邻填层使用不同种类或颗粒条件的填料时，其粒径应符合D15/d85≤4（两层渗水土间）或D15≤（）mm（非渗水土与渗水土间）的要求。否则，两层之间应铺设隔离作用的土工合成材料。

A、0.5

B、1

C、1.5