What does the phase "look over their shoulders" (Lines 1~2,Para.2) mean?
A. Have an eye on what students are talking about online.
B. Pretend not to see anything when students need help.
C. Limit their rights of talking freely online.
D. Have routine checks at school.
查看答案
A.exploresB.demonstratesC.expandsD.covers
A. explores
B. demonstrates
C. expands
D. covers
Which of the following best reflects the humanistic perspective of the five writers?
A. The spiritual and the material worlds are incompatible.
B. Humanity can scarcely account for humans and the world.
C. Self-knowledge stems partly from the perception of the universe.
D. The structure of the universe can be discovered through self-knowledge.
Lu Yi, one of your best friends, is injured in a car accident. Write a letter to him to 1) express your reaction, and 2) suggest a safer way to travel in urban areas. You should write about 100 words on ANSWER SHEET 2. Do not sign your own name at the end of the letter. Use "Li Ming" instead. You do not need to write the address. (10 points)
关于降钙素对骨骼,下列叙述正确的是()。
A. 灭活骨细胞膜的腺苷酸环化酶
B. 促进由骨骼游离钙离子
C. 促进由骨骼游离磷离子
D. 阻滞由骨骼游离钙离子
E. 阻滞由骨骼游离镁离子