在坡道上停放起重机有何规定？
参考答案：
在坡道上停放起重机时应打好止轮器并拧紧手闸，在6‰以上的坡道上作业时应连挂机车。
In his speech, he said that it was his primary school teachers that he was fond of ________influenced his whole life.
A．what
B．which
C．as
D．who
子宫肌瘤在妊娠期间容易发生的变性是（）
A.玻璃样变
B.脂肪样变
C.囊性变
D.红色变
E.肉瘤变
