二硫化钼锂基脂最高使用温度一般不超过()℃。
A.100~150;
B.150~200;
C.200~250;
D.250~300。
参考答案:A
She was put under house arrest two years ago but remained a powerful ________ in last year’s election.
A.symbol
B.portrait
C.identity
D.statue
上尿路结石大多数是
A.黄嘌呤结石
B.磷酸镁铵结石
C.胱氨酸结石
D.草酸钙结石
E.尿酸结石