无症状性尿异常常表现为
A．血尿B．蛋白尿C．两者都是D．两者都不是
参考答案：C
解析：无症状性尿异常常表现为蛋白尿和血尿。
20.______ that caused him to serve dinner an hour later than usual.
A．It was we being late
B．It was our being late
C．It was we were too late
D．It was because we were late
全国进出口简要情况表(2004年)
金额单位：亿美元
2004年1～6月份，我国进出口逆差为（）亿美元。
A．48.8
B．20.3
C．69.0
D．41.3
