【名词&注释】
基因突变(gene mutation)、染色体(chromosome)、进一步发展(further development)、五铢钱、细胞有丝分裂(cell mitosis)
[单选题]育种专家在稻田中发现一株十分罕见的“一秆双穗”植株，经鉴定该变异性状是由基因突变引起的。下列叙述正确的是
A. 这种现象是由显性基因突变成隐性基因引起的
B. 该变异株自交可产生这种变异性状的纯合个体
C. 观察细胞有丝分裂(cell mitosis)中期染色体形态可判断基因突变发生的位置
D. 将该株水稻的花粉离体培养后即可获得稳定遗传的高产品系
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举一反三：
[单选题]What should parents do in raising a teenager according to the text?
A. Not allow him to learn driving or take drugs.
B. Give him advice only when necessary.
C. Let him have his own telephone.
D. Not talk about personal things with him.
[单选题]隋唐时期商业境界较之前代有很大的发展，但仍有许多阻碍其进一步发展的因素其中有
A. 废除五铢钱
B. 市坊分区
C. 实行两税法
D. 草市兴起
[单选题]DThe Cost of Higher Education
A. Individuals (个人) should pay for their higher education.
B. A university education is of huge and direct benefit to the individual. Graduates earn more than non-graduates. Meanwhile, social mobility is ever more dependent on having a degree. However, only some people have it. So the individual, not the taxpayers, should pay for it. There are pressing calls on the resources (资源) of the government. Using taxpayers' money to help a small number of people to earn high incomes in the future is not one of them.
C. Full government funding (资助) is not very good for universities. Adam Smith worked in a Scottish university whose teachers lived off student fees. He knew and looked down upon 18th-century Oxford, where the academics lived comfortably off the income received from the government. Guaranteed salaries, Smith argued, were the enemy of hard work; and when the academics were lazy and incompetent, the students were similarly lazy.
D. If students have to pay for their education, they not only work harder, but also demand more from their teachers. And their teachers have to keep them satisfied. If that means taking teaching seriously, and giving less time to their own research interests, that is surely something to celebrate.
E. Many people believe that higher education should be free because it is good for the economy (经济). Many graduates clearly do contribute to national wealth, but so do all the businesses that invest (投资) and create jobs. If you believe that the government should pay for higher education because graduates are economically productive, you should also believe that the government should pay part of business costs. Anyone promising to create jobs should receive a gift of capital from the government to invest. Therefore, it is the individual, not the government, who should pay for their university education.
F. 68. The underlined word "them" in Paragraph 2 refers to
G. taxpayers
H. pressing calls
I. college graduates
J. government resources
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