下图中的设备是（）
A．ST-ST光纤耦合器
B．SC-SC光纤耦合器
C．ST-SC光纤适配器
D．SC型光纤连接器
参考答案：B
On receiving a phone call from his wife______ she had a fall, Mr Gordon immediately rushed home
from his office. [ ]
A. says
B. said
C. saying
D. to say
下列组合正确的是（）
A.麦康凯琼脂培养基——肠道菌的分离培养
B.罗-琴培养基——结核分枝杆菌培养
C.吕氏血清培养基——白喉棒状杆菌培养
D.巧克力琼脂培养基——流感嗜血杆菌培养
E.碱性蛋白胨水——霍乱弧菌的分离培养
