男性 * * 发育因素( )
A．白蛋白合成减少B．胆周醇合成减少C．雌激素过多D．内毒素血症E．血氨增高
参考答案：C
在卫星接收天线的安装中要注意哪些问题？
The ARQ mode should be applied（）.
A.when two stations communicate with each other
B.in any radio system and at any time
C.when one ship sends a message to another station
D.for communication among some stations
