铆钉成排排列时,钉距或排距要大于或等于()d(d为铆钉直径)。
A.1
B.2
C.3
D.4
参考答案:C
急性胰腺炎时可见().
A.血清S型淀粉酶升高而P型淀粉酶正常,脂肪酶活性不升高
B.血和尿淀粉酶活性升高伴脂肪酶活性升高
C.血清S型淀粉酶和P型淀粉酶可同时升高,也可为两型中任何一型升高
D.血清淀粉酶活性升高以S型为主,36小时恢复正常
E.血清淀粉酶活性升高伴尿淀粉酶活性降低
Tom is good at sports. He plays _______ basketball well, and he plays _______ piano Well, too. [ ]
A. the; the
B. /; /
C. /; the
D. the; /