What Paul Dalton says in the last paragraph is to show
A. Jatropha can make a great amount of money for him.
B. Jatropha can make a difference for his company.
C. Jatropha may play an important role for many countries.
D. Jatropha may grow like weeds in Caribbean countries.
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可以导致脱发的疾病不包括:
A. 感冒
B. 传染病
C. 皮肤病
D. 营养不良
极光属于:
A. 大气光学现象
B. 化学反应现象
C. 物理实验现象
D. 氢弹爆炸现象
A.相告B.治疗C.诊断D.告诉
A. 相告
B. 治疗
C. 诊断
D. 告诉
张衡主要观测的是:
A. 月亮
B. 恒星
C. 太阳
D. 行星