已知条件p：4xx-3＜1，条件q：5x-6＞x2，则p是q的（ ） A．必要不充

患者女性，51岁，农民。因“阵发性胸闷、心悸12小时，伴晕厥1次”入院。患者于入院前12小时清晨起床蹲位排便后起立行走时突发胸闷、心悸、黑矇，呼之不应，持续约10分钟，由急救车急诊入院。既往身体健康。查体：神志清，心肺未发现异常体征。拟诊“冠心病，心绞痛”给予输液治疗观察8小时左右未再发作，但患者下床活动行走约10m处又突感心悸、胸闷，心电图示窦性心动过速，心率120次∕分，给予吸氧，舌下含服硝酸异山梨醇片5mg无好转，约10分钟患者出现呼吸浅快、意识不清，心电监护示：心室颤动。

该患者有双下肢静脉曲张病史，回顾入院时心电图显示：I导联S波明显，Ⅲ导联Q波明显且T波倒置，则该患者心搏骤停最可能的诱发病因是（）。

A.急性心肌梗死

B.病毒性心肌炎

C.夹层动脉瘤

D.扩张型心肌病

E.肺栓塞

F.风湿性心脏病

男性，26岁。持续性腰痛1年余，伴有活动受限及晨僵，活动后减轻，近半年膝关节疼痛就诊。体检：患者身体前弯，后仰，侧弯均受限，化验：RF（一）。

为明确诊断，最重要的辅助检查是（）

A.骶髂关节X线摄片

B.HLA-B27测定

C.抗ds-DNA抗体及抗Sm抗体检查

D.周围关节X线摄片

E.血沉及ANA测定

Ever wonder how much a cloud weighs? What about a hurricane? A meteorologist(气象学者) has done some estimates and the results might surprise you.

Let's start with a very simple white puffy cloud — a cumulus cloud（积云）. How much does the water in a cumulus cloud weigh? Peggy LeMone, senior scientist at the National Center for Atmospheric Research in Boulder, Colorado, did the numbers. "The water in the little cloud weighs about 550 tons," she calculates. "Or if you want to convert it to something that might be a little more meaningful … think of elephants."

The thought of a hundred elephants-worth of water suspended(悬浮的) in the sky begs another question — what keeps it up there?

"First of all, the water isn't in elephant-sized particles（微粒）, it's in tiny tiny tiny particles," explains LeMone. And those particles float on the warmer air that's rising below. But still, the concept of so much water floating in the sky was surprising even to a meteorologist like LeMone. "I had no idea how much a cloud would weigh, actually, when I started the calculations," she says.

So how many elephant units of water are inside a big storm cloud—10 times bigger all the way around than the "puffy" cumulus cloud? Again, LeMone did the numbers: About 200,000 elephants.

Now, ratchet up(略微调高) the calculations for a hurricane about the size of Missouri and the figures get really massive(巨大的). "What we're doing is weighing the water in one cubic meter theoretically pulled from a cloud and then multiplying by(乘上) the number of meters in a whole hurricane," she explains.

The result? Forty million elephants. That means the water in one hurricane weighs more than all the elephants on the planet. Perhaps even more than all the elephants that have ever lived on the planet.

小题1:The weight of      is NOT mentioned in the passage.

A．a cumulus cloud

B．a tornado

C．a hurricane

D．a storm cloud小题2:How did Peggy LeMone feel about the result of her calculations?

A．She found it not convincing.

B．She thought it needed further calculations.

C．She was quite surprised at it.

D．She considered the calculations inaccurate.小题3:What can be inferred from the passage?

A．A storm cloud weighs about 200,000 elephants.

B．The water in a hurricane weighs more than that in any other kind of cloud.

C．There are less than forty million elephants living on the earth.

D．The water in the cloud is in very tiny partials.小题4:What is the best title for the passage?

A．How Much a Cloud Weighs

B．How Much a Hurricane Weighs

C．Surprising Results

D．Elephants in the Sky

异位妊娠的主要症状是()

A．孕后不规则 * * 出血，突然下腹一侧撕裂样剧痛

B．妊娠期间 * * 不时有少量出血，时下时止

C．妊娠期间腰酸，腹痛，小腹下坠，伴少量 * * 出血

D．妊娠期间恶心呕吐，头晕倦怠，甚食入即吐

E．以上均不是

目标市场营销策略有多少种？