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【单选题】

The day of terror at the Virginia Polytechnic and State University in Blacksburg began at about 7:15 a. m. , with the shooting of a woman and a male resident adviser on the fourth floor of a dorm building on campus, Kristen Bensley, a freshman who lived below the floor where the shooting occurred, told TIME, "There were minors going on about the assailant was fighting with his girlfriend or something of that nature." Bensley notes that only residents can get into the building, using a specific "passport", that is, a card that one has to swipe in order to open doors before 10 a.m. If he was an outsider, someone would have had to let him in. Or more likely, he was a resident of the dorm himself. If so, how did be keep so much ammunition unnoticed
Unlike high schools, most universities can’t beef up security with a metal detector or two. So what can be done to protect students Other questions remain unanswered. Why was there a two-hour gap between the incident at the dorm and a far more fatal one across campus At one point, that led to theorizing that more than one gunman was involved. The gunman who killed at least 30 people at Norris Hall shortly after 9 a.m. was described by some sources as an Asian man.
It has been a surreal time for the students. Brandon Stiltner, a senior aerospace engineering student, and Jonathan Hess, a senior mechanical engineer, were watching TV all day but by noon they’d had enough. "We decided we needed to do something," Stiltner said. "We were worthless sitting around." So they took their six-foot Virginia Tech sign off the wall and logged into Facebook. Within the next few hours 100 people replied to their e-mail request for a vigil.
By 8 p.m. hundreds bf students began filing down the steps of the War Memorial Chapel toward the drill field. Clusters of two and three students stood together in silence. Slowly they began to line up to sign the board. "I’m still really in disbelief," says Stiltner. The shock of the day’s shootings sank in, Hess said, as he carried the sign across campus for the vigil. "It hit me," Hess said, "to know that it was in these buildings." The media crews that swarmed campus were also surreal to Hess and Stiltner. "We could look out our window and see exactly what’s on TV," Stiltner says. He watched his sign crowded with initials and prayers, awaiting the names of the victims, He shuddered. "I hope I don’t have any nasty surprises.\
Which of the following is tree according to the first paragraph

A.
7:15 a. m. is the time a woman and a mate resident adviser were killed on the fourth floor of a dorm building on campus.
B.
The cause of shooting is the assailant was fighting with his girlfriend or something of that nature.
C.
Open dorm’s doors needs swipe a card before 10 a. m.
D.
The gunman was a resident of the dorm himself.
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【单选题】18() A.organize B.regulate C.verify D.control

A.
These are tough times for Wal-Mart, America’s biggest retailer. Long accused of (1) small-town America mad condemned for the selfishness of its pay, the company has lately come under (2) for its meanness over employees’ health-care benefits. The charge is arguably (3) : the firm’s health coverage, while (4) less extensive than the average for big companies, is on equal terms (5) other retailers’. But bad publicity, coupled with rising costs, has (6) the Bentonville giant to action. WalMart is making changes that should shift the ground in America’s healthcare debate.
B.
One (7) is to reduce the prices of many generic, or out-of-patent, prescription drugs. Wal-Mart’s critics dismiss the move as a publicity (8) . The list of drugs includes only 143 different medicines and excludes many popular group. True, but short-sighted. Wal-Mart has (9) retailing by using its size to squeeze suppliers and (10) the gains on to consumers. It could (11) the same with drugs. A "Wal-Mart effect" in drugs will not solve America’s health-costs problem: group account for only a small share of drug costs, which in turn make (12) only 10% of overall health spending. But it would (13) .
C.
The firm’s other initiative is more (14) . Wal-Mart is joining the small but fast-growing group of employers (15) are controlling costs by shifting to health insurance with high deductibles.
D.
Early evidence (16) these plans do help firms control the cost of health insurance. But critics say that the savings are (17) . They argue that the plans shift costs to sicker workers, discourage preventative care and will anyway do little to (18) overall health spending, (19) most of the $2 trillion that America (20) health care each year goes to people with multiple chronic diseases.

【单选题】取收缩变形量的经验系数ψs=0.8,则该地基土的收缩变形量为()。 A.3280mm B.3400mm C.120mm D.3520mm

A.
某膨胀土地基分为两层,已知第一层:h1=5m,δep1=25%,λs1=10%,Δω1=0.06;第二层:h2=10m,δep2=30%,λs2=15%,Δω2=0.08。根据《膨胀土地区建筑技术规范》(GBJ112-87)中规定的计算公式。