高速道岔尖轨尖端轨距静态作业验收为±1㎜，水平为1㎜。
参考答案：对
It is said that Chinese eat ______ vegetables per person today as they did about 30 years ago.
A．more than twice
B．as many as twice
C．twice as many as
D．more than twice as many
颅内感染可选用的抗生素()
A.青霉素G
B.泰能
C.喹诺酮类
D.氯霉素
E.三代头孢
