SOLAS公约规定,每艘船舶应至少配备()套消防员装备。
A.1
B.2
C.3
D.4
参考答案:B
_______ which way to take, the little boy behaved like a real gentleman who comforted his sister from time to time.
A.Leaving to wonder
B.Having left to wonder
C.Left wondering
D.Left to wonder
锌缺乏症的临床表现主要为()。
A.食欲减退
B.惊厥
C.生长发育迟缓
D.贫血
E.免疫功能低下