The phrase 'make a grab'(Line 5, Para. 4)is closest in meaning to______.
A．realize huge profits
B．make a great change
C．face a fierce competition
D．take collective actions

未分类题What do we know about mother-reared rhesus monkeys?A．They only stay with their peers until the age of six months.B．They are not easily frightened by strange people and events.C．Their brain and body chemistry may be remarkably changed.D．They abuse or ignore their offspring when becoming mothers.

判断题预制板和梁等受弯构件一般是简支的，在试验安装时采用异位试验。( )

未分类题It can be inferred from Paragraphs 1 and 2 that______.A．human beings can control the environmentB．we are actually not a unique species as we thought ofC．research on monkeys provides enlightenment to humansD．monkeys are usually reared without love and mother care

判断题专设温度补偿应变计时，补偿块材料与试件材料可不同。( )

未分类题According to Paragraph 1, the large-scale blackout in India______.A．exposes the weaknesses of the economyB．frustrates the ambition of the governmentC．changes the world's view upon the nationD．damages the basic installation of power industry