The book was()that I returned it to the library without finishing it
A. so bored
B. returned it
C. to the library
D. without finishing
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He has lived here for years, ()nobody knows what he is.
A. and but
B. though
C. and yet
D. for all that
His unhappy childhood () his bad temper.
A. counts for
B. accounts for
C. makes for
D. goes for
A. setB. to go toC. even thoughD. saved up Jack has (set) his mind(to go to)college next year (even though) he hasn't (saved up). enough money to pay his tuition
链霉素抑制蛋白质合成,其结合的是
A. 真核生物核蛋白体小亚基
B. 原核生物核蛋白体小亚基
C. 真核生物核蛋白体大亚基
D. 原核生物核蛋白体大亚基
E. 氨基酰-tRNA合成酶