题目内容

It can be concluded that the difference between complete proteins, partially complete proteins and incomplete proteins lies in________.

A. the amount of essential amino acids
B. the types of essential amino acids
C. the amount of lysine
D. the combinations of amino acids

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Nick: Hi, Daisy, let me introduce you to Peter. Peter also works at IBM. Peter, this is Daisy, a family friend.Peter: ______

A. Hi, I am Peter Cruis.
B. Hi, how do you do
C. Hi, what do you do
D. Hi, glad to meet you, Daisy.

The new assistant is a quick,________worker, and the executive manager is quite satisfied with her.

A. effective
B. affecting
C. efficient
D. sufficient

Out of________or out of interest, people go back to school for the common goal-to improve themselves.

A. authority
B. community
C. necessity
D. property

Only five of the firm's employees are________; all the other 19 were temporary.

A. permanent
B. persistent
C. perspective
D. pessimistic

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