【单选题】Auroras may be seen in the southern regions of the United States when ______.
A.
the speed of the solar wind is reduced
B.
they are wrapped around the Earth's magnetic poles
C.
magnetic storms do not affect the Earth
D.
solar flares are very intense
【简答题】影响旅游产品分销渠道选择的主要因素有哪些?
【单选题】材料题请点击右侧查看材料问题 查看材料
A.
The high speed of the car.
B.
The distracted driving.
C.
The blurred line of sight.
D.
The poor performance of the car.
【单选题】According to the passage, the speed with which tryptophan is provided to the brain cells of a rat varies with the
A.
amount of protein present in a meal.
B.
concentration of serotonin in the brain before a meal.
C.
concentration of leucine in the blood rather than on the concentration of tyrosine in the blood after a meal.
D.
concentration of tryptophan in the brain before a meal.
E.
number of serotonin-containing neurons present in the brain before a meal.
【判断题】Western印迹转移技术是将PAGE分离后的蛋白质片段,通过电转移作用等转移硝酸纤维薄膜上,并通过抗原-抗体反应进行分析的技术。
【单选题】The car ______ at the present speed until it reaches the foot of the mountain at about 4 o' clock this afternoon.
【多选题】在()样的环境中,配置小区的属性为高速小区?
B.
move in open area at the speed of 120km/h
D.
near high speed railway
【单选题】1995年发生的国债期货风波,涉及的国债期货合约代号是()