发动机电控系统按照喷射位置分为 [ ] 和 [ ] 类型。其中的 [ ] 可以进一步分为 [ ] 和 [ ]。
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It takes at least four years to get a bachelor's degree from an institution of higher learning in the US.
A. 对
B. 错
In the United States school systems, which of the following divisions is true?
A. Elementary school, grammar school.
B. Elementary school, junior high school.
C. Elementary school, secondary school.
D. junior high school,senior high school.
About 90% of American students go to __________ schools and 10% attend ___________ schools.
The goal of education in the United States is to achieve universal _________ and to provide individuals with the knowledge and skills necessary to promote the welfare for individuals and the general public.