【单选题】According to paragraph 3, the heat flow necessary for the production of geothermal energy
A.
is like solar heat on the Earth's surface
B.
happens near tectonic plate boundaries
C.
must always be artificially increased
D.
may be impractical because of its location Paragraph 3 is marked with an arrow [→].
【简答题】计算机网络发展可分为终端-计算机连机系统、计算机-计算机连机系统和______系统三个阶段
【单选题】在现代社会中,( )早已成为推动整个经济社会发展的最重要动力。
【简答题】It’s necessary to 3) _______________.
【多选题】伪基站的诈骗短信一般有以下几种形式?
D.
冒充教育部门或学校向学生或家长发送的校园信息
【简答题】necessary/unnecessary ________
【单选题】自行车的前轴为一不转动的心轴,该轴主要承受弯矩。该轴承受弯矩段的应力属于( )
【单选题】Passage 3 Questions 11 to 15 are based on the following passage: The vitamins necessary for a healthy body are normally supplied by a good mixed diet (饮食) , including a variety of fruits and green veg...
A.
normally contains enough vitamins
B.
still needs special provision of vitamins
C.
is suitable for losing weight
D.
is composed of fruits and vegetables
【单选题】Passage 3 Questions 11 to 15 are based on the following passage: The vitamins necessary for a healthy body are normally supplied by a good mixed diet (饮食) , including a variety of fruits and green veg...
A.
normally contains enough vitamins
B.
still needs special provision of vitamins
C.
is suitable for losing weight
D.
is composed of fruits and vegetables
【单选题】《供电营业规则》规定使用临时电源的用户如需改为正式用电,应按()办理。