【单选题】【消耗次数：1】
白喉首选（ ）
①
青毒素G
②
链霉素
③
四环素
④
SD
⑤
氯霉素
参考答案：
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相关题目
【单选题】
四环素用于（ ）
【单选题】
使用四环素治疗无效的是（ ）
【单选题】
对四环素的抗菌作用机制是
①
影响胞浆膜的通透性
②
与核糖体30s亚基结合，抑制蛋白质的合成
③
与核糖体50s亚基结合，抑制移位酶的活性
④
与核糖体50s亚基结合，抑制肽酰基转移酶的活性
⑤
特异性抑制依赖于DNA的RNA多聚酶活性
随机题目
【单选题】
If you are not certain who should be held responsible for the loss, you might file a claim ________ the insurance agent there.
①
to
②
against
③
in
④
for
【单选题】
Every package shall be marked “CCD” ___diamond and the package number.
①
into
②
in
③
on
④
with
【单选题】
The commodities you offered are________ line with the business scope of our clients.
①
outside
②
out
③
out of
④
without
【单选题】
Please quote us your lowest price, CFR LOS Angeles, including our 5% _____.
①
commission
②
consignment
③
committee
④
co-signature
【单选题】
We should be pleased to send you some samples of our new printers on approval, _______ our own expenses.
①
at
②
on
③
for
④
in
【单选题】
As the enterprise you inquired about is _______ in trading plastic products, we advise your caution in transaction with them.
①
inexperienced
②
inexperience
③
experienced
④
experience
【单选题】
This offer ____ on October 20, 2016. Your immediate reply by e-mail will be appreciated.
①
extends
②
expires
③
includes
④
stops
【简答题】
感谢你方122号询盘，现随函附上标题项下所述我方货物的报盘（详见223号报价单）