煤矿井下的带式输送机必须使用（）输送带。
A、钢丝绳芯；
B、橡胶帆布；
C、阻燃
参考答案：C
Modern science has given ____clear evidence ____ smoking can lead to many diseases ____ it’s time for us to take measures.
A．such; what; that
B．such; which; as
C．such; that; that
D．such; where; that
特发性全面强直一阵挛发作，首选药物是（）
A.丙戊酸钠
B.卡马西平
C.苯妥英钠
D.乙琥胺
E.苯巴比妥
