精液液化时间延长主要见于()。
A.精囊炎
B. * * 炎
C.附睾炎
D.前列腺炎
E.淋病
参考答案:D
铁球的质量是1.95kg,体积是0.4×103m3,问此铁球是空心的还是实心的?
I go to the horse races often, but I only bet______.
A.scarcely B.frequently C.rarely D.occasionally