经代谢转变后,能抑制脱氧胸苷酸合成酶,干扰核酸代谢的药物是()
A.门冬酰胺酶
B.长春新碱
C.长春碱
D.氟尿嘧啶
E.巯嘌呤
参考答案:D
Happy Life Swimming Club Rules1. All swimmers must take a bath before they go into the pool (游泳池).2. Diving (跳水) is only allowed unless you have been a member for at least 1 year.3. Running and playing near the pool are not allowed.4. Club members can bring guests only at weekends.5. Children under 12 are not allowed to use the pool unless their parents are with them.6. Members must show their membership cards before going inside.7. Smoking is not allowed in the room for changing clothes.8. Guests must write down their names before going inside.9. All members must leave before 6 P.M. at workdays.10. All members must leave before 10 P.M. at weekends.11. Clothes must be put in the lockers (带锁柜厨).12. Keep your key of the lockers along with you. If it is lost, you must report to the manager as soon as possible.13. Only club members and their families are allowed to use the pool.
If you’ve lost your key of the locker, what should you do [A] Go to find it soon. [B] Leave the club soon. [C] Report to the manager.
为了保护套管中的管道,可采用()缠绕在管道上,进行阴极保护。
A.电缆
B.柔性阳极
C.带状牺牲阳极
D.带状贵金属氧化物阳极