某投资者欲采取金字塔卖出方式建仓，故先以3.05美元／蒲式耳的价格卖出3手5月玉米合约。此后价格下跌到2.98美元／蒲式耳，该投资者再卖出2手5月玉米合约。当(    )该投资者可以继续卖出1手玉米期货合约。

二维随机变量（   ）。

对多头头寸和空头头寸相抵后的净额加以限制的市场风险控制措施是（  ）。

施工成本目标控制主要依据不包括 （）

某大型露天铁矿将剥离后的黄土和碎石混合散体（约80%为黄土）排至采场西南约3.5km的山沟排土场。排土场容积8000×10⁴m³，总堆置高度320m，总边坡角18°，原始地形坡比1:8，覆盖层为黄土软基。2023年1月10日，排土场出现大面积下沉，随后发生滑坡事故，致使28人死亡。该排土场的滑坡形式是（   ）。

Passage 1    A lyric is a subjective poem of intense personal emotion whose principal quality is its musical form. Poe, master of the lyric, was led to explain all poetry as the thythmical creation of beauty in words. Because great poetry is often pure music, haunting melody, and chiming syllables, the reader should not glance through poetry as he read his newspaper or the latest magazine-skipping a word here and a line there, and still hope to get what the author had intended for him. Poetry being music, like all other forms of music, it gains its meaning when interpreted by the human voice.    It is the special function of lyrical poetry to give pleasure through this musical quality no less than through fine contemplation of beauty it inspires-beauty of thought, of feeling, of expression, and of technical skill. But poetry is more than a great pleasure. It should also be an outlet for our own unspoken thoughts and our varied moods. It makes our choked-up passageways of speech, giving adequate expression to our pent-up loves and joys and glories, and fumishes release and relief to our fears, grieves and sorrows. A great poet takes our half-formed thoughts, or suppressed moods, our crushed desires, and needs, and leads them out into the open, endowing them with a harmony, and completeness ...    Great verse can help to vitalize our thinking about the commonplace and elemental in life, and can idealize and give meaning to the simplest things in creation. Listen to Tennyson:    Flower in the crannied wall,    I pluck you out of the crannies,    I hold you here, root and all, in my hand,    Little flower-but if I could understand,    What you are, root and all, and all in all,    I should know what God and man is.
It can be inferred from Tennyson's poem that ______.

治疗久泻不止 ，不宜过用

刘老师刚刚踏上工作岗位，其能胜任教学工作的最基本的本体性知识属于(         )。

下述规范性文件中属于卫生行政法规的是

首席风险官作为期货公司的高级管理人员，应当向期货公司（  ）负责。

《九章算术》中记载的直角三角形“勾三股四弦五”的关系，是世界上关于勾股定理最早记录。（首都师范大学）