Which of the following words can both be used as predeterminer (前位限定词) and postdeterminer (后位限定词)
A. the
B. both
C. such
D. all
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My nephew ______ from home for three days now, and I am beginning to worry about his safety.
A. has been missed
B. was missed
C. has been missing
D. had been missing
天然强心苷四个环A／B、B／C、C／D一般为
A. 顺／反、反、顺
B. 顺、顺、顺
C. 反、顺、反
D. 顺／反、反、反
E. 反、反、反
In the sentence "He has a wish to travel round the whole country", the italicized part is
A. an attribute.
B. an adverbial.
C. a complement.
D. an appositive.
关于前列腺液，下列正确的说法是
A. 卵磷脂小体在炎症时增多
B. 前列腺颗粒细胞是巨噬细胞吞噬了大量脂滴
C. 标本中无细菌
D. 标本中可见精子
E. 镜检见到畸形的异常细胞，即可诊断为前列腺癌
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