A:
B:
C:1
D:2
图示是某根弹簧的伸长量x与所受拉力F之间的关系图,则该弹簧的劲度系数为____N/cm.
He lost his ____(胃口,食欲) because of his sorrow.
想一想,分一分。
①1+2+3=6 ②9-3=6 ③9-2-0=7 ④5+1=6 ⑤10-3-1=6
⑥3+4=7 ⑦10-0=10 ⑧10-3=7 ⑨8+2=10 ⑩5+4+1=10
选出正确的读音
似乎(sì shì)____ 相逢(xiāng xiàng)____
白发(fā fà)____ 首都 (dū dōu)____