下列叙述正确的是
A.同一周期元素的原子,半径越小越容易失去电子 |
B.同一主族的元素,原子半径越大,氧化性越强 |
C.ⅦA族元素形成的单质,其熔点随元素原子序数增大而降低 |
D.从上到下,ⅦA族元素形成的氢化物稳定性逐渐减弱 |
—— Do you mind my opening the window? It’s a bit hot in here. —— ______ , as a matter of fact
A.Go ahead | B.Yes, my pleasure![]() |
C.Yes, I do | D.Come on |
It’s high time you had your hair cut ; it’s getting _______ .
A.too much long | B.much too long ![]() |
C.long too much | D.too long much |
My friend showed me round the town, ______ was very kind of him.
A.which | B.that | C.where | D.it |
They use computers to keep the traffic _______ smoothly.
A.being run | B.run | C.to run | D.running |
If you leave the club, you will not be_____back in .
A.received | B.admitted | C.turned | D.moved |