头孢菌素类药物的作用机制是与青霉素蛋白结合,影响细胞膜的通透性发挥抗菌作用。
A. 对
B. 错
land transport is usually more affordable than air transport, but more expensive than sea transport.
A. 对
B. 错
for transport hazardous,truckers have to make sure they().
A. affix proper lablels for the respective hazards to their vehicle
B. affix proper label for the respective hazards to their client.
C. affix proper labels for the respective hazards the their driver
D. affix proper labels for the respective hazards to their courier.
使用暖箱时错误的做法是( )
A. 体重2000g以下的患儿可以使用暖箱
B. 暖箱内湿度为55%~65%
C.暖箱应放在阳光下,以保证箱内温度
D. 暖箱不能放于有冷风直吹的地方
E. 暖箱水箱内的水应每日更换