封闭母线的搬运应考虑用( )。
A.汽车起重机
B.轮胎起重机
C.履带起重机
D.桥式起重机
参考答案:A,D
慢性腹泻是指()
A.病程在3个月以上
B.病程在2周以上
C.病程在2个月以上
D.病程在4个月以上
E.病程在4周以上
—I watch I Am a Singer every Friday night.
—Me too. I have never seen a ________ entertainment program.
A.best
B.better
C.worst
D.worse