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【判断题】
质粒DNA转化大肠杆菌时,绝大多数操作需要在冰上操作,并在超净台内完成。A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】A．advance B．obligation C．placement D．accordance
【单选题】 Peter works for a restaurant. He prepares food, using various cooking styles, such as boiling, steaming, roasting and baking. From the information in the box, we know Peter is a (an) _______.
A.
cook
B.
actor
C.
waiter
【简答题】为了预防过敏反应的发生,献血者在采血前_____h应禁食;对过敏史的受血者在输血前应注射______药物。
【单选题】 W: Good morning, Sir. What can I do for you? M: Yes, I want to check out. My name is Peter Black and my room number is 203. The woman works in a ________.
A.
restaurant
B.
hotel
C.
bank
【单选题】In accordance _______ your wishes, I cancelled the meeting.
A.
of
B.
to
C.
with
D.
for
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