【单选题】下列不属于二氧化碳通过植物给人类造成的危害的一项是( )。
【判断题】Iron is believed to facilitate weight loss for females.
【单选题】在分析整流电路工作时,认为晶闸管(开关器件)为( )。
【简答题】翻译句子: This has shown that our planet has a core of heavy material with a density of 8. Two metals, iron and nickel, have densities a little below and above 8 respectively, and the core is believed to ...
【单选题】下列不属于植物生长所需要的营养的是( )
【单选题】植物生长离不开“营养”元素,合理使用化肥能促进农业增产,下列化肥中属于复合肥的是 [ ]
【单选题】Which of the following statement is NOT TRUE according to the passage?
A.
The Moon was born after a giant collision between the young Earth and another planet.
B.
The Moon rocks had a higher ratio of iron 57 to iron 54 isotopes than the Earth rocks.
C.
The Moon and the Earth have almost the same portion of iron.
D.
This catastrophic collision would have released much more energy than the impact believed to have wiped out the dinosaurs.
【判断题】Iron is believed to facilitate weight loss for females.