【单选题】A. brea th B. no th ing C. clo th es D. wea th er
【判断题】一只额定电压为220 V的白炽灯,可以接到最大值为311 V的交流电源上
【判断题】一只额定电压为220V的白炽灯,可以接到最大值为31V的交流电源上。
【简答题】A. brea th B. no th ing C. clo th es D. wea th er
【单选题】变应性鼻炎患者确定变应原的最可靠的方法是
【单选题】A.heal th y B.brea th e C.mo th er D.clo th ing
【单选题】'The La Brea Tar Pits' in paragraph 4 probably signifies things that ______.
A.
can be traced back to the prehistoric age
B.
are traps for those who want to inquire
C.
are located in one place forever
D.
don't deserve full investigation