区间通话柱距离钢轨不少于()m,机柱地面上高度为1000mm。
参考答案:2.5
__________ she couldn’t understand was_________more and more students showed little interest in their lessons.
A.What; why
B.That; what
C.What; because
D.Why; that
既能疏散风热,又能息风止痉的药物是
A.蝉蜕
B.薄荷
C.桑叶
D.菊花
E.牛蒡子