大米的糖类含量约占()。
参考答案:76%
—You see,I’m poor in maths,you are not good at English,and...
—That’s________we should help each other.
A.when
B.where
C.how
D.what
弯曲试验设备应有足够硬度支承辊,其长度应()试样的宽度或直径。
A.等于
B.大于
C.小于