约孕几周前后声像图上可显示胎盘()。
A.4周
B.6周
C.9周
D.12周
E.14周
参考答案:C
既能利水渗湿,又能泄热的药物是
A.猪苓
B.茯苓
C.泽泻
D.冬瓜皮
E.葫芦
________ we stood at the top of the building, we were able to enjoy the town below clearly.[ ]
A. As
B. Although
C. Unless
D. Until