如果半径为3cm的⊙O1与半径为4cm的⊙O2内切,那么两圆的圆心距O1O2= ▲ cm. 答案:1; On April 20,2013, a big and powerful earthquake
attacked Ya’an, Sichuan Province. A great many buildings and houses
collapsed, a lot of people were killed and even more people lost their
homes in the earthquake .
Death toll from the 7.0-magnitude earthquake that hit
Ya’an in southwestern China's Sichuan Province has risen to 188 (as of 18:00
pm, April 22, ), according to latest calculations by local Civil Affairs
Bureau. At least 11,826 were reportedly injured in the quake while 25 are still
missing, the bureau said.
Experts are anticipating much less casualties in the
quake than that from the 8.0 magnitude quake hit Wenchuan on May 12, 2008, also
in Sichuan Province, which killed more than 80,000 and injured over 300,000.
Energy released from Wenchuan earthquake would be 30 times
of that from Ya’an quake, according to Zhang Xiaonan, an expert with China's
Geophysical Union. Dai Junwu with Harbin-based seismological bureau expects the
death toll at less than 1,000, and economic losses from the quake could reach
up to 100 billion yuan.
Police and expert teams have already rushed for rescue
in the quick stricken areas, and the State Council has banned unauthorized
rescue efforts and individual vehicles from going to the quake zone to avoid
congestion(交通阻塞).
Rescue efforts were carried “timely and orderly”, said
Chinese Premier Li Keqiang who flew to the quicken-stricken area on Sunday, the
second day of the quake. He was quoted as saying that “the current priority is
to save lives”.
1.When did Ya’an earthquake occur?
A.April 22,2008 B.April 20,2013 C.May 12,2008 D.May.22 2013
2.How many people injured in the earth(as of 18:00 pm,
April 22 ) according to the passage?
A.About188 B.At least
11,826
C.More than
80,000 D.Over 300,000.
3.What does the underlined word “ collapsed”(
in para.1) mean?
A.fell down
suddenly B.broke up
C.burnt to the
ground D.turned into
pieces
4.Why did the State Council has banned unauthorized
rescue efforts and individual vehicles from going to the quake zone?
A.Because Ya’an earthquake was not as disastrous as Wenchuan
earthquake.
B.Because the
people of Ya’an could save themselves.
C.Because the
State Council wanted to avoid being overcrowded.
D.Because the
State Council wanted to protected the rescuing people
5.Which one is NOT true according to the passage?
A.Wenchuan
earthquake released 30 times energy of Ya’an
earthquake.
B.Premier Li
Keqiang who flew to the quicken-stricken area on April,21,2013.
C.Wenchuan
earthquake killed around 80000 people.
D.Zhang Xiaonan
expected the economic losses from the quake could reach up to 100 billion yuan.