500总吨以上的船舶应配备手提VHF双向无线电话数量是（）台
A.4
B.3
C.2
D.1
参考答案：B
______, he still cannot make himself understood.
A．So clearly he speaks English
B．So clearly does he speak English
C．Clearly as he speaks English
D．As he speaks English clearly
脆性糖尿病发病的根本原因是（）
A.长期大量吃糖
B.胰岛素绝对分泌不足
C.过度肥胖
D.长期应用糖皮质激素
E.胰岛素抵抗
