在靠近开口处两侧各30范围内不允许（）。
参考答案：漏光
计算工业中间投入的具体方法是正算法和倒算法两种。（）
There are _________of nurses in our school but only _______of them are boys.
A． hundreds, three hundred.
B．hundred, three hundreds
C． hundreds, three hundreds.
D．hundred, three hundred
