据统计肾癌发病占全身恶性肿瘤的()。
A.4%
B.1%
C.3%
D.2%
E.5%
参考答案:C
Every year,nearly 270 million pounds of grapes arrive in California,most of them _______ from Chile to the Port of Los Angeles.
A.are shipped
B.is shipped
C.shipping
D.shipped
阳极表面生成了()、()、牢固的保护膜,可使阳极发生强烈极化。