Grammar schools select children, usually at the age of 11, through an examination called ______.

A . 正确 B . 错误

A . 含水污染物i的排放浓度 B . 评价河段含水污染物i的浓度 C . 含水污染物i的地表水水质标准 D . 含水污染物i的废水排放量

A . ACAT B . LCAT C . 肝脂酶 D . 胰脂酶 E . 脂蛋白脂肪酶

A . 正确 B . 错误

A . 正确 B . 错误

A . A．是双链经常断裂的部位，可诱导重组 B . B．是单链经常断裂的部位，导致单链同化作用 C . C．是RecBCD复合物作用的位点，在这些位点，受双链断裂激活的RecBCD复合物切开一个自由3′-OH端 D . D．是顺式作用元件，在该元件内可以产生一个单链的自由3′-OH端 E . E．是RecA蛋白结合的DNA位点，RecA蛋白从该点沿着DNA移动直到断裂点

A . 正确 B . 错误

A．are B．to be C．being D．have been

Schoolboys gained their skill in Latin in a bitter way.They kept in mind the rules to make learning by heart easier.They first made a word-for-word translation and then an idiomatic translation into English.As they increased their skill they translated their English back into Latin without referring to the book and then compared their translation with the original.The schoolmaster was always at hand to encourage them.All schoolmasters believed Latin should be beaten in . After several years of study the boys began to write compositions in imitation of the Latin writers they read.And as they began to read Latin poems they began to write poems in Latin.Because Milton was already a poet at ten his poems were much better than those painfully put together by the other boys.During the seven years Milton spent at university he made regular use of his command of Latin.He wrote some excellent Latin poems which he published among his works in 1645. 1.What does the passage mainly tell about？[] A.How John Milton wrote“Paradise Lost” B.How John Milton studied Latin C.How John Milton became famous D.How John Milton became a poet 2.Which of the following is true of John Milton’s pronunciation of Latin？[] A.It has a strong Italian accent B.It has an uncommon accent C.It was natural and easy to understand D.It was bad and difficult to understand 3.It can be inferred from the passage that ________. A.Milton’s training in Latin was similar to that of the other boys B.Milton hadn’t learned any foreign language except Latin before going to college C.Milton’s Italian friends helped him with Latin when talking D.Milton's classmates learned Latin harder but worse than Milton 4.Which of the following is suggested in the passage？[] A.The schoolmaster mainly helped those who were bad at Latin B.The schoolmaster usually stood beside the schoolboys with a stick in his hand C.The schoolboys could repeat Latin grammar rules from memory D.Some of the schoolboys were quick at writing compositions in Latin 5.What is the meaning of the underlined part“Latin should be beaten in”that the writer wishes you to understand？[] A.Schoolboys should be punished if they were lazy to learn Latin B.Schoolboys should be encouraged if they had difficulty in learning Latin C.Schoolboys were expected to master Latin in a short time D.Schoolboys had to study Latin in a hard way