小麦一生中抗寒力最强的时期是什么时候？

In data communication, data link is those parts of two data terminal equipments that are controlled by a protocol along with the (71) data circuit, which together enable data (72) . So-called protocol means, in short, a set of rules that determines the behavior of functional units in achieving communication.

Data circuit, however, consists of a pair of (73) transmission channels that provides a means of two-way data transmission. Between data switching exchanges, the data circuit may or may not include data circuit-terminating equipment (DCE), depending on the type of (74) used at the data switching exchange. Between a data station and a data switching exchange or data concentrator, the data circuit includes the DCE at the data station end, and may include equipment (75) to a DCE at the data switching exchange or dam concentrator location.

（75）处填（）。

A．correspondent

B．comparable

C．similar

D．analogous

患者男性，55岁，既往体健，本次在烈日下进行体力活动3小时后出现大量出汗，口渴，并胸闷、心悸、恶心、呕吐等症状，随后患者出现嗜睡。

患者入院后已昏迷，测口腔温度40.8℃，脉搏120次∕分，血压80∕50mmHg，唇发绀，呼吸30次∕分，有阵发性抽搐，全身散在出血点。该患者诊断首先考虑（）。

A.低血容量性休克

B.感染性休克

C.热衰竭

D.热射病

E.脑血管意外

单选：如果可信限水平为85％～90％，该求助者FIQ的波动范围是（）。

A．90～100

B．110～120

C．102～112

D．104～110

据人民网报道，有一集团拟将在太空建立巨大的激光装置，把太阳光变成激光用于分解海水制氢，其反应可表示为：2H₂O2H₂↑＋O₂↑。下列几种说法：①水分解反应是放热反应；②氢气是一级能源；③使用氢气作燃料有助于控制温室效应；④若用生成的氢气与空气中的二氧化碳反应生成甲醇储存起来，可改善生存条件。其中叙述正确的是                                                            

A．①②

B．②③

C．③④

D．①②③④

儿童脊柱结核好发于（）

A.骶椎

B.胸椎

C.腰椎

D.颈椎

E.以上都是