公路在转折点两侧相邻直线处,为了满足车辆行驶顺适,安全和速度的要求,必须用()连接。
A.缓和曲线
B.平直线
C.折线
D.平直线或曲线
参考答案:A
—Listen! Is it Linda singing in the next room?
—No, it _ be her. She is still in Shanghai. [ ]
A. can't
B. couldn't
C. may not
D. might not
对耐氯喹的恶性疟患者,应选用()
A.乙胺嘧啶
B.伯氨喹
C.磺胺多辛
D.奎宁
E.吡嗪酰胺