已知水稻高秆（T）对矮秆（t）为显性，抗病（R）对感病（r）为显性，这两对基因在非同源染色体上。现将一株表现型为高秆、抗病的植株的花粉授给另一株表现型相同的植株，所得后代表现型是高秆：矮秆=3：1，抗病：感病=3：1。根据以上实验结果，判断下列叙述错误的是：（   ）                                               

通读全文，根据短文理解，选择最佳答案填空。

    My father is forty years old. He works in a 1 . He is a waiter. He is very 2 every day. He goes to work very early and 3 home very late. Our home is a bit far(远的) from his workplace, so he usually 4  a bus to work. He has a lot of things 5 every day. There are many people in the restaurant every day, and there are more people 6 Saturdays and Sundays. People like to come to the restaurant 7  it has some specials for dumplings every day. The bowls have three 8 small, medium, and large. If you don't have enough money with you, you may 9  them next time. My father is 10 to everyone, so people like to talk with him.

电能表上标有“600r/kW·h”的字样，她让电水壶单独工作，观察到1min内电能表的表盘转过18圈，则它的电功率为____ kW。她发现有电水壶的插头上E略长一些，如图所示，较长的那根插头E接的是插座中的____（火线/零线/地线）；当她把家中空调也接入时，发现电能表表盘转得更快，此时电路中电流做功将____（多/快）一些。

按照玻尔原子理论，氢原子中的电子离原子核越远，氢原子的能量____（选填“越大”或“越小”）．已知氢原子的基态能量为 E₁（E₁＜0），电子质量为 m，基态氢原子中的电子吸收一频率为ν的光子被电离后，电子速度大小为____（普朗克常量为 h）．

如果a<0，那么下列各式中一定为负数的是（   ）