20+4=____ 29-9=____ 65-5=____ 40+8=____ 32-2=____ 14-6=____
26-6=____ 50+5=____ 7+9____ 30+3=____ 58-8=____ 7+90=____
20-9=____ 15-9=____ 13-5=____ 11-6=____ 6+10-8=____ 12-3-6=____ 6+8+10=____ 11-3-7=____ 0+12=____ 13-6-3=____ 14-9+8=____ 12-5=____
在如图所示的圆锥摆中,已知绳子长度为L,绳子转动过程中与竖直方向的夹角为θ,试求小球做圆周运动的周期____.
I am a middle-school student. Now let 1 tell you something 2 our classroom. It's very 3 There are two maps4 the back wall. 5is a map of China.6 is a map of the world (世界).There are7 desks and chairs in our classroom. There is a big desk 8 theteacher in the front of it. We 9 four classes in the 10 and two in the afternoon
老年人易患骨质疏松症,是骨中缺少( )
某公司经理在招聘员工时说:"对于一个公司来讲,员工首先应诚实守信,其次才是有才能"公司聘用了有才能而不守信的人,比公司聘用了能力差的人危害更大。这启示我们( )①诚信是一个重要的行为准则 ②诚信是一个人融入社会,取得他人信任的基础③社会需要有真才实学、诚实守信的人 ④诚信是一个集体、一个社会健康有序发展的关健因素