收费站值班领导必须每天对电视监控系统的录像资料至少抽查两次。
参考答案：错
Experts warn that global warming will cause climate changes, including more ______ floods, heat waves and droughts.
A．frequent
B．usual
C．ordinary
D．common
规定检查溶出度的药物是
A．硫酸阿托品片(0.3mg)B．阿司匹林片(0.3g)C．盐酸普鲁卡因注射液D．醋酸地塞米松软膏E．硫酸锌颗粒
